Clarion 28184 4M560 Скачать руководство пользователя

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PP-2538T

PN-2541K

- 2 -

5. Cautions regarding chips.

Do not reuse removed chips even when no abnormality

is observed in their appearance. Always replace them

with new ones. (The chip parts include resistors, capaci-

tors, diodes, transistors, etc). The negative pole of tanta-

lum capacitors is highly susceptible to heat, so use spe-

cial care when replacing them and check the operation

afterwards.

6. Cautions in handling flexible PWB

Before working with a soldering iron, make sure that the

iron tip temperature is around 270 . Take care not to

apply the iron tip repeatedly(more than three times)to the

same patterns. Also take care not to apply the tip with

force.

7. Turn the unit OFF during disassembly and parts replace-

ment. Recheck all work before you apply power to the

unit.

8. Cautions in checking that the optical pickup lights up.

The laser is focused on the disc reflection surface through

the lens of the optical pickup. When checking that the

laser optical diode lights up, keep your eyes more than

30cms away from the lens. Prolonged viewing of the la-

ser within 30cms may damage your eyesight.

9. Cautions in handling the optical pickup

The laser diode of the optical pickup can be damaged by

electrostatic charge caused by your clothes and body.

Make sure to avoid electrostatic charges on your clothes

or body, or discharge static electricity before handling the

optical pickup.

9-1. Laser diode

The laser diode terminals are shorted for transpor-

tation in order to prevent electrostatic damage.

After replacement, open the shorted circuit. When

removing the pickup from the mechanism, short

the terminals by soldering them to prevent this

damage.

9-2. Actuator

The actuator has a powerful magnetic circuit. If a

magnetic material is put close to it. Its characteris-

tics will change. Ensure that no foreign substances

enter through the ventilation slots in the cover.

9-3. Cleaning the lens

Dust on the optical lens affects performance. To

clean the lens, apply a small amount of isopropyl

alcohol to lens paper and wipe the lens gently.

EXPLANATION OF IC

pin 14: CONNECT VDD : - : Connect to the VDD.

pin 15: BLKCK

: IN : The sub code block clock input.

pin 16: ACC DET

: IN : ACC detection signal input.

pin 17: BU DET

: IN : Backup detection signal input.

pin 18: SW 9V

: O : 9V power supply control.

pin 19: BEEP

: O : Beep out.

pin 20: REQ O

: O : Transmit request signal output.

pin 21: ILL CNT

: O : The illumination control.

pin 22: T DATA

: O : The display data output for the test mode

indication.

pin 23: PON 2

: O : Power ON signal output.

pin 24: TX

: O : Serial data output of N-BUS.

pin 25: RX

: IN : Serial data input of N-BUS.

pin 26: NU

: - : Not in use.

pin 27: A MUTE

: O : The audio mute signal output.

pin 28: M DATA

: O : The command data output to the CD IC.

pin 29: STAT

: IN : The status data input from the CD IC.

pin 30: M CLK

: O : The clock puse output to the CD IC.

pin 31: LIMIT

: IN : Sled limit switch signal input.

pin 32: SW 1

: IN : The switch signal input.

pin 33: SW 2

: IN : The switch signal input.

pin 34: EPM

: IN : Pull down.

pin 35: P ON 1

: O : Power ON signal output.

pin 36: PT 2